Background atmospheric CO₂ mixing ratios from individual flask air samples for Southhampton, Bermuda. Only measurements satisfying the data selection criteria fro background measurements are plotted. Consecutive background measurements are joined by lines. Background measurements interrupted by non-background measurements are not joined by lines.

Monthly atmospheric CO2 mixing ratios for Southampton, Bermuda, expressed in parts per 
million (ppm) and reported in the Scripps Institution of Oceanography X93 manometric 
mole fraction scale.  Annual values were calculated by CDIAC for years with complete records.  
Missing values are denoted by -99.99.



Year      Jan 	     Feb      Mar	April	  May	   June	     July      Aug     Sept	  Oct 	   Nov       Dec     Ann




1989    -99.99     -99.99   -99.99     -99.99   357.14    354.08    350.78   349.60   351.12     351.88   352.81    354.81   -99.99
1990    355.56     356.44   357.85     359.10   358.56    354.53    352.35   351.45   349.91     352.84   356.13    356.04   355.06
1991    357.41     358.19   359.80     361.55   359.98    358.06    356.33   350.80   349.60     354.97   356.29    357.13   356.68
1992    359.33     359.89   360.68     360.17   358.81    358.63    356.10   348.76   347.32     353.04   355.70    356.77   356.27
1993    359.37     361.09   360.11     359.82   358.59    356.16    355.63   353.69   353.20     355.50   356.34    357.98   357.29